This holiday was observed on differing dates from the time of the Founding Fathers until FDR fixed it as the fourth Thursday in November in 1941.
Thanksgiving

A Flute
The breakfast of champions.
Wheaties
While the Earth only has one of these, Jupiter has 95.
Moons
Released in 1969, True Grit, co-starring Glenn Campbell and Robert Duval, became the only Oscar-winning role in this Hollywood icon's 50-year career.
John Wayne

Oregon
An quicker, alternative route.
(The answer contains the word SHORT)
A Short Cut
Thirty states officially celebrated this early September holiday before it became a federal holiday in 1894, honoring the American labor movement.
Labor Day

A Tuba
Melts in your mouth, not in your hands.
M&Ms
This planet has the most extensive and impressive ring system in our solar system.
Saturn (Jupiter, Uranus, and Neptune also have rings)
This 1961 Best Picture Oscar-winning musical starred Natalie Wood and Richard Beymer and was a direct adaptation of Shakespeare's Romeo and Juliet.
West Side Story

Minnesota
The state animal of Texas.
(The answer contains the word LONG)
The Longhorn
This roving holiday of feasting and excess is always celebrated on the Tuesday before Ash Wednesday, the beginning of the fasting season of Lent.
Mardi Gras

A Saxophone
Double your pleasure, double your fun.
Doublemint Gum
This planet, one of Earth's neighbors, is known as the Red Planet.
Mars
This American music icon won her only Best Actress Oscar for her role as Fanny Brice in the 1969 musical, Funny Girl.
Barbra Streisand

Louisiana
A tendency to lose one's temper quickly.
(The answer contains the word SHORT)
A Short Fuse
In Mexico it's a holiday commemorating their victory over the French Empire at the Battle of Puebla, in the US it's a reason to drink tequila and eat Mexican food.
Cinco de Mayo

A Trombone
When you care enough to send the very best.
Hallmark Greeting Cards
This is the only planet in our solar system not named after a Roman god.
The Earth
She won the Best Actress award in 1964 for her title role in the musical, Mary Poppins, and starred in 1965's Best Picture Oscar-winning musical, the Sound of Music.
Julie Andrews

Montana
Continuing at length in speech or writing, usually in a tedious way.
(The answer contains the word LONG)
Long Winded
This week-long, year-end celebration honors African heritage in African-American culture and culminates in a feast and gift-giving.
Kwanzaa

A French Horn
Plop, plop, fizz, fizz, oh, what a relief it is!
Alka Seltzer
99.86% of the solar system’s mass is found in this one celestial body.
The Sun
He became the first African American actor to win an Oscar for Best Actor for his performance in the 1961 drama/comedy, Lilies of the Field.
Sidney Poitier

Nevada
Borrowed from the electrical industry, this term means to suddenly stop functioning due to overload or stress.
(The answer contains the word SHORT)
Short Circuit